Bag expanding device

ABSTRACT

A bag expanding device includes a base portion having two first foldable portions connected to two sides thereof along a first folding portion which is connected between the first foldable portion and the base portion. Two second foldable portions are connected to the two first foldable portions along a second folding portion which is located to connect the first foldable portion and the second foldable portion. Each of the two first folding portions and each of the two second folding portions have at least one biasing member connected thereto such that the first and second foldable portions can be expanded away from the base portion to expand the bag.

FIELD OF THE INVENTION

The present invention relates to a bag expanding device for expandingbags to maintain the bags in expanded status, and the device is flattento a thin combination which saves storage room.

BACKGROUND OF THE INVENTION

A conventional expanding device for maintaining bags in expanded orusing status is shown in FIGS. 6 and 7, and the expanding device makesthe bag have no obvious wrinkles on the bags and display the shape ofthe bag as designed. The conventional expanding device generallyincludes a flat C-shaped board which includes a base portion 8 and twofolded portions 81 which are extended from two ends of the base portion8 and are folded toward the base portion 8 to reduce the thicknessthereof. Two springs 7 are compressed between the base portion 8 and thetwo folded portions 81. A strip 6 is wrapped around the expanding devicealong the gap between the two ends of the folded portions 81 so as torestrict the two folded portions 81 from being pivoting upward. A wireis tied to the strip 6. The expanding device is put into a bag 9 asshown in FIG. 6 and the user then pulls the wire 61 which cuts the strip6 so that the two springs 7 pop upward and the two folded portions 81pivot upward and away from the base portion 8 as shown in FIG. 8 toexpand the bag 9. However, the conventional expanding device includestoo many parts and a complicated structure which includes themanufacturing cost. Besides, the thickness is still too thick.

The present invention intends to provide a bag expanding device whichincludes a simple structure and can be folded to a thin status forconvenience of storage.

SUMMARY OF THE INVENTION

The present invention relates to a bag expanding device that comprises abase portion having two first foldable portions connected to two sidesthereof and the two first foldable portions is foldable along a firstfolding portion located to connect the first foldable portion and thebase portion. Two second foldable portions are connected to the twofirst foldable portions and foldable along a second folding portionwhich is located to connect the first foldable portion and the secondfoldable portion. At least one first biasing member is connected to eachof the two first folding portions, and at least one second biasingmember is connected to each of the two second folding portions andbiased between the first foldable portion and the second foldableportion.

The primary object of the present invention is to provide a bagexpanding device that is easily to be manufactured and can be folded tohave a thin thickness.

The present invention will become more obvious from the followingdescription when taken in connection with the accompanying drawingswhich show, for purposes of illustration only, a preferred embodiment inaccordance with the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view to show the bag expanding device of thepresent invention;

FIG. 2 is a cross sectional view to show that the bag expanding deviceof the present invention is in flattened status;

FIG. 3 shows that the flattened bag expanding device is out into a bag;

FIG. 4 shows torsion springs are installed to the folding portions ofthe bag expanding device of the present invention;

FIG. 5 shows that the bag is expanded by the bag expanding device of thepresent invention;

FIG. 6 shows a cross sectional view of a conventional bag expandingdevice in flattened status;

FIG. 7 shows the perspective view of the conventional bag expandingdevice, and

FIG. 8 shows that the conventional bag expanding device expands the bag.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to FIGS. 1 and 2, the bag expanding device 1 of the presentinvention comprises a base portion 11 which is a rectangular board andincludes two first foldable portions 12 connected to two sides thereofand the two first foldable portions 12 are foldable along a firstfolding portion 13 which is located to connect the first foldableportion 12 and the base portion 11. Two first biasing members 2 areconnected to each of the two first folding portions 13 and biasedbetween the base portion 11 and the first folding portion 13. Each ofthe two first biasing members 2 is a torsion spring which includes twolegs 21 which are respectively in contact with the base portion 11 andthe first folding portion 13.

Two second foldable portions 14 are connected to the two first foldableportions 12 and foldable along a second folding portion 15 which islocated to connect the first foldable portion 12 and the second foldableportion 14. A second biasing member 20 is connected to each of the twosecond folding portions 15 and biased between the first foldable portion13 and the second foldable portion 14. Each of the second biasingmembers 20 is a torsion spring which includes two legs 210 which arerespectively in contact with the first foldable portion 12 and thesecond foldable portion 14.

The base portion 11, the first foldable portions 12 and the secondfoldable portions 14 can be made by paper boards or plastic boards.

As shown in FIGS. 3 to 5, the bag expanding device 1 is inserted into abag 3 while the first and second foldable portions 12, 14 are pressed onthe base portion 11. After the bag expanding device is inserted into abag 3 as shown in FIG. 3, the first and second foldable portions 12, 14are released such that the first and second biasing members 2, 20 expandand the first foldable portions 12 and the second folding portions 14are expanded away from the base portion 11 to expand the bag 3 as shownin FIG. 5.

While we have shown and described the embodiment in accordance with thepresent invention, it should be clear to those skilled in the art thatfurther embodiments may be made without departing from the scope of thepresent invention.

1. A bag expanding device comprising: a base portion having two firstfoldable portions connected to two sides thereof and the two firstfoldable portions foldable along a first folding portion which islocated to connect the first foldable portion and the base portion; twosecond foldable portions connected to the two first foldable portionsand foldable along a second folding portion which is located to connectthe first foldable portion and the second foldable portion; at least onefirst biasing member connected to each of the two first folding portionsand biased between the base portion and the first foldable portion, andat least one second biasing member connected to each of the two secondfolding portions and biased between the first foldable portion and thesecond foldable portion.
 2. The device as claimed in claim 1, whereinthe at least one first biasing member is a torsion spring which includestwo legs which are respectively in contact with the base portion and thefirst foldable portion.
 3. The device as claimed in claim 1, wherein theat least one second biasing member is a torsion spring which includestwo legs which are respectively in contact with the first foldableportion and the second foldable portion.
 4. The device as claimed inclaim 1, wherein the base portion, the first foldable portions and thesecond foldable portions are made by paper boards.
 5. The device asclaimed in claim 1, wherein the base portion, the first foldableportions and the second foldable portions are made by plastic boards. 6.The device as claimed in claim 1, wherein the base portion is arectangular board.